21259765793382 has 16 divisors (see below), whose sum is σ = 43668708116592. Its totient is φ = 6895059176160.

The previous prime is 21259765793381. The next prime is 21259765793447. The reversal of 21259765793382 is 28339756795212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21259765793381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47882355169 + ... + 47882355612.

It is an arithmetic number, because the mean of its divisors is an integer number (2729294257287).

Almost surely, 2^{21259765793382} is an apocalyptic number.

21259765793382 is an abundant number, since it is smaller than the sum of its proper divisors (22408942323210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21259765793382 is a wasteful number, since it uses less digits than its factorization.

21259765793382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95764710823.

The product of its digits is 342921600, while the sum is 69.

The spelling of 21259765793382 in words is "twenty-one trillion, two hundred fifty-nine billion, seven hundred sixty-five million, seven hundred ninety-three thousand, three hundred eighty-two".